input/regression/bookparts.ly fails at PDF conversion stage

[lilypond.git] / lily / include / book.hh

diff --git a/lily/include/book.hh b/lily/include/book.hh
index 6b1c2bfb14ca48e7a60380fcab1b3b883d9e7601..3ea6c2c550b0346db2e77d88903df91735c6a2b4 100644 (file)
--- a/lily/include/book.hh
+++ b/lily/include/book.hh
@@ -29,7 +29,7 @@
 class Book : public Smob<Book>
 {
 public:
-  SCM mark_smob ();
+  SCM mark_smob () const;
   static const char type_p_name_[];
   virtual ~Book ();
   SCM header_;